Wrench-plate.



B. F. MOORE WRENCH PLATE.

APPLICATKON FILED AUG.8, 191s.

1,28,961 Patented Dec. 24, 1918.

FTCE.

BENJAMIN F. MOORE, OF HAMILTON, KANSAS.

WRENCH-PLATE.

Application filed August 8, 1918.

useful Wrench-Plate; and I do hereby declare the'following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to an oil well'swivel wrench, and has for its objectto provide a device of this character-which embodies novel features of construction whereby the bits, jars,0r other tools being operated upon by the wrench will be held in such a manner that there is no danger of the tools becoming accidentally disengaged from the wrench and dropping into the hole or upon the tool dresser.

Further objects of the invention are to provide a device of this character which can be manufactured at no increase in cost over the ordinary swivel wrench, which can be used in substantially the same manner, which can be readily brought into and out of engagement with the tools to be operated upon, and which renders it practically impossible for the tools to be jarred out of position while suspended by the wrench.

WVith these and other objects in view, the

invention consists in certain novel combinations and arrangements of the parts as will more fully appear as the description proceeds, the novel features thereof being pointed out in the appended claims.

For a full understanding of the invention, reference is to be had to the following description and accompanying drawings, in which Figure 1 is a side elevation of an oil well swivel wrench provided with a jaw constructed in accordance with the invention, a portion of the handle being broken away.

Fig. 2 is a top plan view of the wrench with a portion of the handle broken away.

Fig. 3 is a top plan View of the wrench jaw, a drill bit being shown by dotted lines in operative position'within the jaw.

Fig. 4 is a detail perspective view of the upper plate of the wrench jaw.

Fig. 5 is a detail view showing a portion of a drill bit in engagement with the wrench aw.

Corresponding and like parts are referred to in the following description and indi- Specification of Letters Patent.

Patented Dec.24, 1918.

Serial N 0. 248,891.

cated in all the views of the drawings by the-same reference characters.

Referring to the drawings, which illustrate one embodiment of the invention, :the numeral '1 designates the'supp'orting lever which may be suspended from any suitable crane or fork by means of'a chain or link connected to the eye 2. The forward end of the lever is forkedand the arms of the fork are loosely connected by'means of the links 3 to a swivel ring- 4: upon which the jaw A is pivotallymounted. The swivel ring-his provided with-an'open side and the" opening 5 of the jaw A alsoextends through one side thereof so that it can be rotated into registry with the open side of the swivelring when "it isdesired to place the wrench in engagement with a tool such as the drill bit B. The jaw A is formed with a peripheral groove 6 which engages the ring 4 so that the jaw is" free to rotate upon the ring, and for convenience in assembling the jaw is formed with a remov able upper plate 7 which is rigidly secured to the separable lower plate of the jaw by suitable fastening means such as the screws 8. When this upper plate 7 is removed the jaw can be applied to or detached from the ring 4, although when the parts are assembled the jaw is held securely in position within the swivel ring 4, although it is free to rotate thereon.

The essential feature of this invention consists in the provision of the jaw A with a pair of upstanding lugs 10 arranged at opposite sides of the mouth of the opening 5, said lugs having the outer sides thereof beveled at 10, while the inner sides thereof terminate in square shoulders 10". In the present instance these lugs 10 are carried by the plate 7, and the purpose of these lugs is to engage a bit, jar or other tool which is supported by the wrench and prevent the tool from jumping out of the wrench or becoming accidentally disengaged therefrom. With the ordinary swivel wrench it is a regular occurrence for bits, jars and other tools to jump out of the wrench while being operated upon thereby, and there is danger of the released tool dropping into the well hole, or dripping upon and injuring the tool dresser. When the great loss or injury which may be caused by the accidental release and dropping of a heavy oil well tool is taken into consideration, the importance of the present invention will be appreciated. A

fishing operation to recover a lost tool from an oil well frequently means the loss of many thousands of dollars, while a tool dresser might be injured for life if struck by one of these heavy tools. As indicated by Fig. 5, the lugs 10 will engage the drill bit or'other tool as it is supported by the jaw A and render it practically impossible for the drill bit or other tool to be jarred or accidentally shaken out of position. At the same time, there is no difiiculty in bringing the wrench into and out of engagement with the tool.

Having thus described the invention, what I claim as new and desire to secure by Letter's Patent, is

1. An oil well swivel wrench including a swivelring having an open side, a jaw r0- tatably mounted upon the swivel ring and having an opening extending through one side of the jaw and adapted to be brought into and out of registry with the open side of the ring, and a pair of stop lugs projecting upwardly from the jaw on opposite Gopiesot this patent may be'obtained for beveled while the inner sidesthereof terminate in square shoulders, said lugs serving to prevent the accidental disengagement of a tool from the jaw. a s r I V a In testimony whereof I have signed-my name to this specification in the presence of 7 two subscribing witnesses. V

' BENJAMIN'F. MOORE. Witnesses: V

ALBERT S. Boonn, FLOYD STEVENSON;

five cents each, by addressing the Commissioner of Patents. Washingtoinhfl. 

